See also: https://www.theguardian.com/science/2018/nov/14/impact-crater-19-miles-wide-found-beneath-greenland-glacier https://www.theguardian.com/science/2018/

See also: https://www.theguardian.com/science/2018/nov/14/impact-crater-19-miles-wide-found-beneath-greenland-glacier https://www.theguardian.com/science/2018/nov/14/impact-crate... http://advances.sciencemag.org/content/4/11/eaar8173 http://advances.sciencemag.org/content/4/11/eaar8173